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    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
    <p><input type="text" placeholder="添加品牌" id="input"><button id="btn">添加</button></p>
    <ul id="parent">
        <li><span>小米</span><a href="#">删除</a></li>
        <li><span>苹果</span><a href="#">删除</a></li>
        <li><span>华为</span><a href="#">删除</a></li>      
    </ul>
    <script>
        var parent=document.getElementById("parent");
        var input=document.getElementById("input");
        var btn=document.getElementById("btn");
        btn.onclick=function(){
            var value=input.value;
            var li=document.createElement("li");
            var span=document.createElement("span");
            span.innerHTML=value;
            li.appendChild(span);
            var a=document.createElement("a");
            a.href="#";
            a.innerHTML="删除"
            li.appendChild(a);

            parent.appendChild(li);
            input.value=""
        }
        var deletes=document.getElementsByTagName("a");
        for(var i=0;i<deletes.length;i++){
            deletes[i].onclick=function(){
                var parentNode=this.parentNode;
                parentNode.style.display="none";
                return false;//阻止跳转事件的执行
            }
        }
    </script>
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</html>